Effect of Biobed Composition, Moisture, and Temperature on the Degradation of Pesticides
Biobeds retain and degrade pesticides through the presence of a biobed mixture consisting of straw, peat, and soil. The effects of biobed composition, moisture content, and temperature on pesticide degradation were investigated in laboratory studies. Straw produced the main microbial activity in the...
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Published in | Journal of agricultural and food chemistry Vol. 55; no. 14; pp. 5725 - 5733 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
11.07.2007
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Subjects | |
Online Access | Get full text |
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Summary: | Biobeds retain and degrade pesticides through the presence of a biobed mixture consisting of straw, peat, and soil. The effects of biobed composition, moisture content, and temperature on pesticide degradation were investigated in laboratory studies. Straw produced the main microbial activity in the biobed mixtures as strong positive correlations were observed between straw, respiration, and phenoloxidase content. Most pesticides investigated were dissipated by cometabolic processes, and their dissipation was correlated with respiration and/ or phenoloxidase content. More pesticides were more dissipated at biobed moisture levels of 60% water holding capacity (WHC) than at 30% and 90% WHC, while 20 °C gave higher dissipation rates than 2 and 10 °C. A straw:peat:soil ratio of 50:25:25% v/v is recommended in field biobeds since this produces high microbial activity and low pH, favorable for lignin-degrading fungi and phenoloxidase activity. Keywords: Biobeds; pesticides; degradation; white-rot fungi; phenoloxidases; manganese peroxidase; Phanerochaete chrysosporium |
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Bibliography: | ark:/67375/TPS-6FQ029R2-V istex:D868004B097D209CAF0E88852B2124D765D29599 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-8561 1520-5118 |
DOI: | 10.1021/jf0707637 |